Greetings David,
When you first turn the key during the initial power on light test does the light attempt to light at all?
Try these steps.
# Turn the key to the point where all the dash light light up before you turn the key far enough to start the ignition. Also known as accessory position. Does the light work? If it does not work, then it is likely the bulb in the dash that lights to show low fuel.
# If it does show up and lights on the dashboard during the previous test then it is likely the sending unit in the tank.
Report back the result and I can dig you up some further instructions. The Hondas from memory are usually designed to light up if less then 2 gallons of gas.
Hope this helps!!
Cheers
Monte